Flow cytometry (FCM) enables ploidy and proliferative tissue activity (PHASE S) to be quickly and objectively measured. This method is of predictive value regarding the biological behaviour of bladder tumours. The authors used FCM in a 5-year-follow-up study of 75 patients with papillary bladder carcinoma, who underwent therapeutic or staging transurethral resection in 1989. Results show a strict correlation between stage-ploidy-Progression as well as the significance of S-PHASE cells in relation to low-grade diploid tumours.
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